Sometimes you can get “VT-x is not available. (VERR_VMX_NO_VMX)” error if you are trying to start x64 bit virtual machine in VirtualBox.

Failed to open a session for the virtual machine Windows 10 TP.
VT-x is not available. (VERR_VMX_NO_VMX).
Result Code: E_FAIL (0x80004005)
Component: Console
Interface: IConsole {8ab7c520-2442-4b66-8d74-4ff1e195d2b6}
 
 
There are three most common reasons for this error:

Your CPU doesn’t support VT-x Read More →

OK, you got “.img” virtual machine image. Now what?
Diving in VMWare, Oracle Virutal Machine, etc, etc, there is not a shadow of the option to choose “new virutal machine” from .img image.
What should I do?
1. Download Qemu (ported version for OSX) http://www.kju-app.org/
2. After installing it on Mac (works fine for me on Maverick),

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cd /Application/Q.app/Contents/MacOS/qemu-img
./qemu-img convert -f raw -O vmdk /Volumes/xxx/rawdisk200gb.img /Volumes/xxx/vdisk200gb.vmdk

3. Next, Read More →